- document
-
Vermeer, W.W.M. (author), Stecca, M. (author), Chandra Mouli, G.R. (author), Bauer, P. (author)In this paper a review on the effects of pulse charging of lithium based battery technology is done. Results published in existing literature are not in complete agreement regarding the effects of pulse charging. Several studies claim to have beneficial effects on charging efficiency, charging time, and capacity fade. While others have found...conference paper 2021
- document
-
Vermeer, W.W.M. (author), Bandyopadhyay, S. (author), Bauer, P. (author)Since the power transfer efficiency in inductive power transfer (IPT) systems is directly related to the coupling of the transformer, coil misalignment can drastically decrease the efficiency. In this paper a misalignment tolerant control scheme is proposed which tracks the maximum power transfer efficiency point under misalignment. It does this...conference paper 2020
- document
-
de Vries, Tim N.C. (author), Bronkhorst, Joris (author), Vermeer, Martijn (author), Donker, Jaap C.B. (author), Briels, Sven A. (author), Ziar, H. (author), Zeman, M. (author), Isabella, O. (author)A quick-scan yield prediction method has been developed to assess rooftop photovoltaic (PV) potential. The method has three main parts. For each roof, first (i) virtual 3D roof segments were reconstructed using aerial imagery, then, (ii) PV modules were automatically fitted onto roof segments using a fitting algorithm and finally, (iii) expected...journal article 2020
- document
-
Vigueras Guillén, J.P. (author), van Rooij, Jeroen (author), Engel, Angela (author), Lemij, Hans G. (author), van Vliet, L.J. (author), Vermeer, K.A. (author)Purpose: To present a fully automatic method to estimate the corneal endothelium parameters from specular microscopy images and to use it to study a one-year follow-up after ultrathin Descemet stripping automated endothelial keratoplasty. Methods: We analyzed 383 post ultrathin Descemet stripping automated endothelial keratoplasty images from...journal article 2020
- document
-
Ghafaryasl, B. (author), Vermeer, Koenraad A. (author), Kalkman, J. (author), Dore-Callewaert, T.W.J. (author), Boer, Johannes F.D.E. (author), van Vliet, L.J. (author)The attenuation coefficient (AC) is an optical property of tissue that can be estimated from optical coherence tomography (OCT) data. In this paper, we aim to estimate the AC accurately by compensating for the shape of the focused beam. For this, we propose a method to estimate the axial PSF model parameters and AC by fitting a model for an...journal article 2020
- document
-
Vermeer, W.W.M. (author), Chandra Mouli, G.R. (author), Bauer, P. (author)This paper proposes a two-stage smart charging algorithm for future buildings equipped with an electric vehicle, battery energy storage, solar panels, and a heat pump. The first stage is a non-linear programming model that optimizes the charging of electric vehicles and battery energy storage based on a prediction of photovoltaïc (PV) power,...journal article 2020
- document
-
Vigueras Guillén, J.P. (author), Sari, B. (author), Goes, S.F. (author), Lemij, Hans G. (author), van Rooij, Jeroen (author), Vermeer, K.A. (author), van Vliet, L.J. (author)Background<br/><br/>Corneal endothelium (CE) images provide valuable clinical information regarding the health state of the cornea. Computation of the clinical morphometric parameters requires the segmentation of endothelial cell images. Current techniques to image the endothelium in vivo deliver low quality images, which makes automatic...journal article 2019
- document
-
Miedema, Nico Arjen (author), Vermeer, Jop (author), Lukosch, S.G. (author), Bidarra, Rafael (author)In recent years, many promising developments have taken place around augmented, virtual and mixed-reality technology. One could wonder whether these technologies can be combined to yield a mix of video games and sports, involving physical activities previously deemed impossible: creating a superhuman sport. This work investigates how mixed...conference paper 2019
- document
-
Vigueras Guillén, J.P. (author), van Rooij, Jeroen G.J. (author), Lemij, Hans G. (author), Vermeer, K.A. (author), van Vliet, L.J. (author)The morphometric parameters of the corneal endothelium – cell density (ECD), cell size variation (CV), and hexagonality (HEX) – provide clinically relevant information about the cornea. To estimate these parameters, the endothelium is commonly imaged with a non-contact specular microscope and cell segmentation is performed to these images. In...conference paper 2019
- document
-
Vigueras Guillén, J.P. (author), Lemij, Hans G. (author), Van Rooij, Jeroen (author), Vermeer, K.A. (author), van Vliet, L.J. (author)In images of the corneal endothelium (CE) acquired by specular microscopy, endothelial cells are commonly only visible in a part of the image due to varying contrast, mainly caused by challenging imaging conditions as a result of a strongly curved endothelium. In order to estimate the morphometric parameters of the corneal endothelium, the...conference paper 2019
- document
-
Alaka, Shaad (author), Cunha, Max Lopes (author), Vermeer, Jop (author), Ziliotto Salamon, N. (author), Balint, J.T. (author), Bidarra, Rafael (author)Working in teams is a common approach to solving problems. However, new teams often suffer from a form of cold start, by which individual members are not yet comfortable expressing their ideas. Previous work has shown that ideation can be stimulated by promoting a sense of psychological safety among team members and instilling an ambiance of...journal article 2019
- document
-
Vigueras Guillén, J.P. (author), Andrinopoulou, Eleni Rosalina (author), Engel, Angela (author), Lemij, Hans G. (author), van Rooij, J. (author), Vermeer, K.A. (author), van Vliet, L.J. (author)Corneal endothelium images obtained by in vivo specular microscopy provide important information to assess the health status of the cornea. Estimation of clinical parameters, such as cell density, polymegethism, and pleomorphism, requires accurate cell segmentation. State-of-the-art techniques to automatically segment the endothelium are...journal article 2018
- document
-
Ghafaryasl, B. (author), Vermeer, K.A. (author), Kalkman, J. (author), Dore-Callewaert, T.W.J. (author), de Boer, J.F. (author), van Vliet, L.J. (author)The attenuation coefficient (AC) is a property related to the microstructure of tissue on a wavelength scale that can be estimated from optical coherence tomography (OCT) data. Since the OCT signal sensitivity is affected by the finite spectrometer/detector resolution called roll-off and the shape of the focused beam in the sample arm,...conference paper 2018
- document
-
Vermeer, Job (author), Alaka, Shaad (author), de Bruin, Niels (author), Miedema, Nico Arjen (author), Winnubst, Nick (author), Trap, Cyril (author), Bidarra, Rafael (author)League of Lasers is a motion-based game where two teams compete in a mix between football and Pong [2]. Players use `virtual mirrors' to try to guide a laser pulse towards the opponent team's target. The game aims at stimulating interaction between players by making cooperation a vital part of the gameplay, while having them physically move...conference paper 2018
- document
-
Vermeer, Kaz (author), Kuppens, P.R. (author), Herder, J.L. (author)The presented research demonstrates the synthesis of two-dimensional kinematic mechanisms using feature-based reinforcement learning. As a running example the classic challenge of designing a straight-line mechanism is adopted: a mechanism capable of tracing a straight line as part of its trajectory. This paper presents a basic framework,...conference paper 2018
- document
-
Vigueras Guillén, J.P. (author), Engel, Angela (author), Lemij, Hans G. (author), van Rooij, Jeroen (author), Vermeer, K.A. (author), van Vliet, L.J. (author)Clinical parameters related to the corneal endothelium can only be estimated by segmenting endothelial cell images. Specular microscopy is the current standard technique to image the endothelium, but its low SNR make the segmentation a complicated task. Recently, we proposed a method to segment such images by starting with an oversegmented...conference paper 2018
- document
-
Griffioen, Simon (author), Vermeer, Martijn (author), Dukai, Balázs (author), van der Spek, S.C. (author), Verbree, E. (author)Knowledge of people's locations and related mobility patterns are important for many decision-making processes. How to efficiently use the available space, is a common problem in many fields. Wireless Local Area Networks (WLAN) are widely used for locating mobile devices within this network. This study attempts to identify movement from Wi-Fi...conference paper 2017
- document
-
Adal, K.M. (author), Van Etten, Peter G. (author), Martinez, Jose P (author), Rouwen, Kenneth W. (author), Vermeer, K.A. (author), van Vliet, L.J. (author)People with diabetes mellitus need annual screening to check for the development of diabetic retinopathy. Tracking small retinal changes due to early diabetic retinopathy lesions in longitudinal fundus image sets is challenging due to intra- and inter-visit variability in illumination and image quality, the required high registration accuracy...journal article 2017
- document
-
Ghafaryasl, B. (author), Baart, Robert (author), de Boer, J.F. (author), Vermeer, K.A. (author), van Vliet, L.J. (author)Optical coherence tomography (OCT) yields high-resolution, three-dimensional images of the retina. A better understanding of retinal nerve fiber bundle (RNFB) trajectories in combination with visual field data may be used for future diagnosis and monitoring of glaucoma. However, manual tracing of these bundles is a tedious task. In this work,...conference paper 2017
- document
-
Adal, K.M. (author), Van Etten, Peter G. (author), Martinez, Jose P (author), Rouwen, Kenneth (author), Vermeer, K.A. (author), van Vliet, L.J. (author)Automated detection and quantification of spatio-temporal retinal changes is an important step to objectively assess disease progression and treatment effects for dynamic retinal diseases such as diabetic retinopathy (DR). However, detecting retinal changes caused by early DR lesions such as microaneurysms and dot hemorrhages from...conference paper 2017